Câu 6: CCD-410: Cloudera Certified Developer for Apache Hadoop (CCDH)
You've written a MapReduce job that will process 500 million input records and generated 500 million key-value pairs. The data is not uniformly distributed. YourMapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reduces which is a potential bottleneck. A c…
Nội dung câu hỏi
You've written a MapReduce job that will process 500 million input records and generated 500 million key-value pairs. The data is not uniformly distributed. YourMapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reduces which is a potential bottleneck. A custom implementation of which interface is most likely to reduce the amount of intermediate data transferred across the network?
Các lựa chọn
Đáp án được giữ gọn theo nhãn A, B, C, D trong phần bình chọn tương tác.
- A. Partitioner
- B. OutputFormat
- C. WritableComparable
- D. Writable
- E. InputFormat
- F. Combiner — đáp án hiện tại
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